The U.S. Senate has approved a 10-year extension of a sanction on Iran Thursday. The bill, which already passed through the House in November, passed unanimously in the Senate and will now go to the desk of President Barack Obama who is expected to sign it.

Supreme Leader Ayatollah Khamenei had warned of retaliation if the U.S. were to extend the sanction on Iran, claiming it would be a violation of the nuclear agreement which was reached last year.

The Iran Sanctions Act was adopted in 1996 in order to impede investments in Iran’s energy industry and deter the acquisition of nuclear weapons.

However, Khamenei said that a 10-year extension does violate the terms agreed upon and warned Iran would “react to it.”

“The current U.S. government has breached the nuclear deal in many occasions,” Khamenei said before the bill passed, addressing a gathering of members of the Revolutionary Guards, according to his website.

“The latest is extension of sanctions for 10 years, that if it happens, would surely be against JCPOA, and the Islamic Republic would definitely react to it,” he added.

Khamenei has also threatened to “set fire” to the Iran Deal if President-elect Donald Trump were to get rid of it.

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Investigative journalist Adam Kredo reported last Tuesday that the Obama administration, in its final days, is attempting to cover up key details of the Iran agreement and block all investigate inquires.

CIA Director John Brennan, who is stepping down in January, warned Trump of the consequences if he were to shred the Iran deal. He has also advised the incoming administration about the potential dangers in reneging on the agreement.

“I think it would be disastrous,” Brennan told the BBC. “First of all, for one administration to tear up an agreement that a previous administration made would be unprecedented.”